la pagina lo trovata : http://validator.w3.org/

ma mi da questi errori nel mio codice cosa significano, cosa devo cambiare x correggere questi errori :

codice:
Below are the results of attempting to parse this document with an SGML parser. 

Line 8, column 17: there is no attribute "LEFTMARGIN" (explain...). 
  <body leftmargin="5" topmargin="5" marginwidth="5" marginheight="5">
                   ^
Line 8, column 31: there is no attribute "TOPMARGIN" (explain...). 
  <body leftmargin="5" topmargin="5" marginwidth="5" marginheight="5">
                                 ^
Line 8, column 47: there is no attribute "MARGINWIDTH" (explain...). 
  <body leftmargin="5" topmargin="5" marginwidth="5" marginheight="5">
                                                 ^
Line 8, column 64: there is no attribute "MARGINHEIGHT" (explain...). 
  ...argin="5" topmargin="5" marginwidth="5" marginheight="5">
                                                          ^
Line 9, column 42: there is no attribute "BORDERCOLOR" (explain...). 
  <table width="500" border="1" bordercolor="#CCCCCC">
                                            ^

grazie !